mary s



(No Model.)

G. F. BOOS.

Patented Sept. 7,1897.

fig: .7;

IN VEN 7' I? WITNESSES 1 l l' l By Il l, I

r'I f/ ATTUHNEYS.

UNITED STATES nTnNT Ormes@ GEORGE FRICDRICII BOOS, OF ST. MARYS, OHIO,ASSIGNOR TO TIIE ST. MARYS MACHINE COMPANY, OF SAME PLACE.

STOP-MOTION FOR GOVERNORS.

SPECIFICATEON forming part of Letters Patent No. 589,635, datedSeptember 7, 1897.

Application filed November 2l, 1896. Serial No. 612,985. (No model.)

.'Zo @Z5 wwit t indy concern.

e it known that I, GEORGE FREDRIOK Boos, ot St. Mary'ls, in the countyof Auglaize and State of Ohio, havel invented a new and ImprovedStop-Motion for Governors, of which the following is a full, clear, andexact description.

The invention relates to centrifugalgovernors for engines and othermachines; and its object is to provide a new and improved stop-motionwhich is simple and-durable in construction and arranged to at onceshutoff the motive agent from the engine in case the drivin g-belt forthe governor slips oft', breaks, or otherwise becomes nnserviceable.

The invention consists principally of a cam mounted to turn andcontrolled by an arm carrying an idler-pulley for the belt and aspring-pressed lever held in engagement at one side of its fulcrurn withthe said cam and having connection with the valve-stem at the other sideof the fulcrum. s y

The invention also consists of certain parts and details andcombinations of the same, as will be fully described hereinafter andt-hen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indi catecorresponding parts in both the ligures.

Figure I is a side elevation of the improvement with parts in section,and Fig. 2 is an enlarged transverse section of the same on the line 2 2of Fig. `I.

The governor on which the improvement is applied is provided with theusual valvestem A, connected with ball-levers B, fulcrumed in theball-frame C, mounted to turn in the governor-frame and connected bygearwheels D D with a pulley-shaft E, carrying a pulley F, connected.byabelt Gr with a pulley on the driving or other shaft of the engine, sothat when the latter is running the belt G rotates the puliey F andshaft lil, and the rotary motion off the latter is transmitted by thegear-whecls D' and D to the frame C in the usual mannerV The belt G isengaged by an idler-pnlleyll, jonrnaled on an arm I, having its hub Imounted to turn loosely on the shaft E, and on the said hub is formed orsecured a cam J, preferably made heartshaped, .as indicated in Fig` 2,with an open web, into which extends a friction-roller K, mounted on'theend ot a lever K, fulcrnmed at K2 on the governor-frame. rEhe other end.of the lever K engages collars A' on the valvestem A.

The outer end of the lever IlV is connected with a rod L, engaged by aspring L", held in a casing L2, attached to the governorirame. Nuts L3on the rod L permit of adjusting the tension of the spring L, whichlatter serves to press the lever K.

It is evident that as the friction-roller Ii extends in the open web ofthe cam .I the lever K is free to swing up and down, according to thenp-and-down movement of the valve-stem A caused bythe action oftheballlevers B; but when the belt G breaks, slips olif, or otherwisebecomes unserviceable then the idler-pulley H drops and in doing socauses a downward swinging of the arm I, so that the cam .I is turnedand the friction roller K is carried upward by the cam-surfaces, thusimparting a swinging motion to the lever K, with the outerend in anupward direction and the inner end in a downward direction, to shift thevalve-stem A downward to seat the valve on its seat, and thereby' shutoff the motive agent Yfrom the engine.

It will be seen that by the arrangement described the downward swingingof the arm I is very sudden, and consequently an immediate closing ofthe valve takes place by the mechanism above described.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- I. The combination with the stem of theshut-olf valve, of a normallyfstationary cam mounted to turn, anidler-pulley normally bearing against the driving-belt, an armconnecting said pulley to said cam, and a springpressed lever held inengagement at one side of its fnlcrum with the said ca1n,and having aconnection with the valve-stem at the other side of the fulcruin,substantially as described.

2. A Stopmotion forgovexjuol's, comprising ing' au idler-pulley adaptedto engage 11m L Springpressed laver adapted to engug@ the dfvngbeltforth@ governor, subsmntally as valve-stem, a friction-roller carried atthe shown :md desevbed.

outer end of the said lever, a heart-shaped GEORGE FREDRIGK BOOS. camengaged at its inside bythe said frc- Witnesses:

t0n1011e1,and im 5min mounted to swing and J. D. HENDERSON,

carrying the said mm, the said :m11 Support- J. N. COVAULT.

